We visit an amazing combination bridge - the Oresund Bridge linking Malmo, Sweden and Copenhagen, Denmark. Here engineers had to build an artificial island to link the bridges and house an underground tunnel. As the amazing engineering behind the Oresund combination bridge is explored, we'll uncover the high stakes involved in building the world's largest, most complex bridges.

Originally released by National Geographic, 2006. Streaming video file encoded with permission for digital streaming by Infobase on April 07, 2015.

Mega Bridge (2:36); --Bridge Proposals (5:45); -- Artificial Island (5:06); -- Environmental Protections (4:36); -- National Challenges (4:51); -- Submersible Tunnel Segments (4:06); -- Denmark's Great Belt Tunnel (4:15); -- Oresund Cable-Stayed Bridge (8:24); -- The Oresund Link World Records (10:33); .